What does PSP steel plastic composite pipe mean

Pipes are used in a wide range of applications. Tubing is used in many industries.

Different industries have different characteristics of different industries, so they have different technical requirements.

Pipe is a relatively mature product, and various industries have corresponding technical standards.

Detect pipes, select the corresponding product standards according to the industry in which the pipes are applied, and test the corresponding technical indicators according to the needs of the industry.

Generally, there are size indexes, inner diameters, outer diameters, wall thicknesses.

Strength index, the strength index of the pipe includes radial compressive strength, i.e., ring stiffness, compliance index, bending index, impact strength, etc.

For pipes used in drinking water, there are technical indicators for hygiene, as well as indicators for water pressure.

For the communication industry, there are also other technical requirements.

The specifications of general household water pipes include DN15 (4 pipes), DN20 (6 pipes), DN25 (1 inch pipe), DN32 (1 inch 2 pipes), DN40 (1 inch and a half pipe), DN50 (2 inch pipes), DN65 (2 inch and a half pipes), DN80 (3 inch pipes), DN100 (4 inch pipes), DN125 (5 inch pipes), DN150 (6 inch pipes), DN200 (8 inch pipes), DN250 (10 inch pipes), etc.

Usually the 4 subdivision is in inches, so the 4 subdivision is 1 2 inches (4 8 1 2), and one inch is 25 4mm, so the inner diameter of the 4 subdivision is 25 4 2 12 7mm, and this is the inner diameter of the DN15 water pipe.

1. PSP steel-plastic pipe hot melt connection: PSP steel-plastic composite pressure pipe uses double hot melt connection, and the double hot melt pipe fittings implement the industry standard CJ T 237-2006 standard.

The CJ T237-2006 (double hot melt pipe fittings for steel-plastic composite pressure pipes) standard promulgated by the Ministry of Construction of the People's Republic of China is a widely used connection method for PSP steel-plastic composite pipes in the country.

2. PSP steel-plastic pipe flaring (internal expansion) connection: implement the industry standard CJ T 253-2007 "Pipe Fittings for Steel-Plastic Composite Pressure Pipe".

PSP steel-plastic composite pressure pipe with flaring (internal expansion G-type compression) connection, the implementation of the industry standard CJ T 253-2007 standard CJ T 253-2007 issued by the Ministry of Construction of the People's Republic of China CJ T 253-2007 "Steel-plastic composite pressure pipe fittings" is a mechanical metal connection method of PSP steel-plastic composite pipe.

3. PSP steel-plastic pipe clamping connection: PSP steel-plastic pipe implements the industry standard CJ T 253-2007 "Pipe Fittings for Steel-Plastic Composite Pressure Pipe".

PSP steel-plastic composite pressure pipe with flared (internal expansion G-type clamping) connection, in accordance with the industry standard CJ T 253-2007 standard.

There are two connection methods of PSP steel-plastic composite pipe, one is double hot melt connection, and the other is internal expansion flared connection.

1. Double hot melt connection.

Generally, it is used for DN160 or less, and flange connection is used for DN160 or more. It is characterized by all-plastic sealing connection, which avoids the contact between the steel belt and air and water, has a good protection effect on the pipe and water, and the connection is convenient and reliable without leakage.

2. Internal expansion flaring connection.

DN20-DN25 is connected by pressing, DN32-DN63 is connected with thread connection, DN75-DN110 is connected with bolt expansion, DN160-DN200 is connected with flaring, of course, this is also adopted according to the design drawings and the needs of the owner, and some projects above DN63 are connected with flaring.

The internal expansion and flaring connection of PSP steel-plastic composite pipe is characterized by convenient connection, reliable connection, no water leakage, no need to consider the surrounding temperature, and is a bit close to the traditional thread connection. The connection method of plastic-lined steel pipe is threaded, which is the same as the traditional galvanized steel pipe connection.

Steel-plastic composite pipes are divided into two types: plastic lining and plastic coating, if the design is plastic lining, it can be replaced by plastic-coated steel pipes, but if the design is plastic-coated, it cannot be replaced by plastic-lined steel pipes. The general connection method is: PSP steel-plastic composite pipe, the specification is less than 100 mm, and it is threaded; Between one hundred and two hundred is a grooved connection; More than two hundred are flange welding. Sometimes it depends on the pressure requirements.

We are a manufacturer, and we do a flared connection method and an electromagnetic fusion connection method. To be precise, there should be three connection methods: one is double hot melt connection, the national standard CJ T237-2006 uses transition joint connection, one is mechanical flared connection CJ T253-2007, and the other is electromagnetic hot melt, there is no standard yet.

Hubei Dayang Plastic Electromagnetic induction double hot melt connection intelligent connection saves time and labor and is simple and convenient to operate.

Hubei Dayang Plastics**** electromagnetic double hot melting, welding technology is the world's leading.

1. The supporting connecting pipe fittings of PSP steel-plastic composite pipe are divided into four types according to different application environments and occasions: 1) Clamping (disturbing lead clamping groove) copper pipe fittings, which are easy to install, high pressure-bearing capacity and strong anti-corrosion ability. 2) Buried ring graphite cast iron groove pipe fittings are easy to install and easy to maintain.

2. Threaded connection, groove connection, flange welding, and steel-plastic composite pipe are generally connected with threads. The general connection method is: PSP steel-plastic hollow trouser fitting pipe specification, within 100 mm, it is threaded and connected to Li Jian; Between one hundred and two hundred is a grooved connection; More than two hundred are flange welding. Sometimes it depends on the pressure requirements.

3. According to the use environment and its own characteristics, PSP steel-plastic composite pressure pipe has three mechanical connection methods: internal expansion interface, flaring interface and pressing interface. This article mainly introduces the characteristics of these three connection methods and their specific construction operation methods.

4. The connection method is the same as the plugging method, but the pipe joint is not used, and one end of each section of the plastic-coated pipe is flared. As the socket, the flaring section of one section of the plastic-coated pipe is inserted into the socket of the other section of the plastic-coated pipe. Apply sealant to the links and fill the gaps between the coated tubes.

PSP steel-plastic composite pressure pipe is a pipe with welded steel pipe as the middle layer, the inner and outer layers are polyethylene plastic, and special hot-melt adhesive is used to composite into one pipe by extrusion molding method. The English name is Plastic-Steel-Plastic Composite Pressure Pipe, referred to as PSP pipe, PSP steel-plastic composite pressure pipe is divided into flared connection, double hot melt transition connection, intelligent electromagnetic induction double hot melt, of which intelligent electromagnetic induction double hot melt connection is referred to as "electromagnetic connection", "E-PSP steel-plastic composite pressure pipe".

1. The complete steel pipe layer is the main pressure-bearing layer of the pipe body, so the pressure-bearing capacity of the pipe is not affected by the change of the performance of the plastic layer;

2. Compared with plastic pipes, it has higher strength, rigidity and impact resistance, has a low expansion coefficient and creep resistance similar to steel pipes, and the tensile strength is 7-8 times that of pure plastic pipes, and the buried pipe can withstand the external pressure that greatly exceeds that of pure plastic pipes;

3. It has self-tracerability. Because the middle steel pipe layer is a complete confined layer, it can be traced with a magnetic metal detector, and there is no need to bury tracking or protection marks, which can avoid excavating damage and provide great convenience for emergency repair and maintenance;

4. Strong anti-corrosion ability. Both the inside and outside plastic are PE, insoluble in any solvent, and the chemical properties are stable. It can resist the corrosion of various acids, alkalis and salt solutions at room temperature, and there is no need to take additional anti-corrosion measures for the pipe when the pipeline is buried and installed, and the installation of GB50268 requires only local anti-corrosion measures for the flange interface, which saves a lot of installation and construction time and costs.